Why is the ninth month called September?
"vehicle mounted on runners for use on ice and snow," 1703, American and Canadian English, from Dutch slee, shortened from slede (see sled (n.)). As a verb from 1728. Related: Sleighing. Sleigh-ride is first recorded 1770; sleigh-bells is from c.1780; they originally were used to give warning of the approach of a sleigh.